Plumbing follows the very basic laws in nature- pressure, gravity and water seeking its own level. The plumbing system in your house is typically made up of two separate subsystems. One of the subsystems brings in the freshwater while the other one takes the wastewater out. The water coming inside your house is under pressure. It enters your house under enough pressure so that it can travel around corners, upstairs or wherever you want the water to go. As the water surges inside your home, it will pass through a meter that will register the amount that you use. The main water stop o shutoff is usually located close to the meter. When you are in a plumbing emergency, it is important that you quickly close the main valve. If you forget to do so, whenever a pipe bursts, it can flood your home in no time. If the emergency however is confined to a tub, sink or toilet, you may not want to put it off your entire water supply. It is for this reason that most fixtures do not have individual stop valves.
Water coming from the main supply will then immediately become ready for your cold water supply needs. The hot water supply on the other hand will require another step. One pipe will carry water coming from the cold water system into your water heater. From the heater, the hot water line will carry the heater water towards all the outlets, fixtures and appliances that will require hot water. The thermostat located on the heater will maintain the temperature that you select by simply turning the heating elements of the device on and off as required. The normal temperature setting for your home water heater is just between 140 deg Fahrenheit and 160 deg Fahrenheit but usually, 120 degrees Fahrenheit setting will be adequate and is also much more economical. There are also some automatic dishwashers which will require you a much higher temperature of water though many of these have water heater within them that boosts the temperature to another 20 degrees Fahrenheit.
If you have problems with your plumbing system as well as your heating and cooling systems, you can ask the help of M & S Plumbing & Heating to assist you.